DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 136

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6.3
Registers related to the bus controller are as follows.
• Bus control register (BCR)
• Basic area/area 1 control register (BCRA1)
• Area 2 control register (BCRA2)
• Area 3 control register (BCRA3)
6.3.1
BCR is used to specify the external extended selection, inversion control of CS1 to CS3, AS, and
AH pins, as well as idle cycle insertion.
Rev.2.00 May. 28, 2009 Page 96 of 732
REJ09B0059-0200
Bit
7
6
5
4
3
2
1
Bit Name
⎯
ICIS
⎯
⎯
⎯
⎯
PNCASH
Register Descriptions
Bus Control Register (BCR)
Initial
Value
1
1
0
0
0
1
0
R/W
R/(W)
R/W
R/(W)
R/(W)
R/(W)
R/(W)
R/W
Description
Reserved
The initial value should not be changed.
Idle Cycle Insert
When external read cycle and external write cycle
continue, it selects whether idle cycle 1-state is inserted
or idle cycle is not inserted.
0: Idle cycle is not inserted
1: Idle cycle 1-state is inserted
Reserved
The initial value should not be changed.
Reserved
The initial value should not be changed.
Reserved
The initial value should not be changed.
Reserved
The initial value should not be changed.
Address Strobe/Hold Polarity Control
Controls output polarity of address strobe signal (AS)
and address hold signal (AH).
0: AS/AH output
1: AS/AH output